Disc with high transmission behavior in the visible spectral range and with high reflection behavior for heat radiation

摘要

The sheets are coated by cathodic sputtering. A first layer 1 of a material from the group of oxides consisting of ZnO, SnO2, In2O3, TiO2, ZrO2, Ta2O5, SiO2, Al3O3 or mixtures thereof or of one of the nitrides AlN, Si3N4 or mixtures thereof or of aluminium oxynitride, titanium oxynitride, zirconium oxynitride or silicon oxynitride or mixtures thereof, with a thickness of from 20 to 60 nm is applied to the substrate S. This is followed by a second layer 2 of one of the metals Ag, Cu or mixtures thereof, with a thickness of from 5 to 30 nm, a third layer 3 of one of the metals Pd or Pt or mixtures thereof, with a thickness of from 0.2 to 5 nm, preferably 0.5 nm, and a fourth layer 4 as metallic or suboxidic (substoichiometric) layer of one of the metals Ti, Cr or mixtures thereof or an alloy containing at least 15% of one of the metals, with a thickness of from 0.5 to 5 nm, preferably 1.5 nm. Finally, a fifth layer 5 of a material which corresponds to the first layer 1 is applied. …IMAGE…